An updated overview on metal nanoparticles toxicity.

Area of Science:

• Nanotechnology
• Toxicology
• Materials Science

Background:

• Thousands of nanoparticles (NPs) exist, with applications expanding across various fields.
• Over 5,000 consumer products now contain NPs, yet ingredient transparency is lacking.
• Limited understanding of NP toxicity hinders biomedical applications, particularly in cancer diagnosis and treatment.

Purpose of the Study:

• To review the origin, behavior, and biological toxicity of different metal NPs.
• To rationalize health hazards associated with widespread NP use.
• To emphasize toxicological concerns and the need for established safety guidelines.

Main Methods:

• Literature review of existing studies on metal NP toxicity.
• Analysis of NP behavior and biological interactions.
• Discussion of mechanisms of NP-induced toxicity, including reactive oxygen species production and metal ion release.

Main Results:

• Metal NPs can induce carcinogenesis through radical oxygen species production.
• The release of reactive metal ions contributes to NP toxicity.
• Current safety guidelines and consumer awareness regarding NPs are insufficient.

Conclusions:

• There is an urgent need for well-defined guidelines to control NP exposure and evaluate toxicity.
• Increased transparency regarding NP presence in consumer products is essential.
• Further research into NP toxicology is critical to ensure safe application, especially in medicine.